Re: Pondering... Boat Club? Seasonal boat ownership? Long term?
To the OP, if i was in your shoes, I would buy a cheapish used pontoon boat, pay for whatever type of storage best suits you, and use it for a couple years. After that period of time you will gain a much better understanding of what owning a boat is like, and how much money you really want to put into your future dream boat, or maybe you will just sell it and swear off boating (i doubt it). A pontoon with a good outboard on it is about as easy at it gets for reliability and cost to be on the lake. Low stress too, because docking is not such an issue as it is with a shiny new fiberglass hull (and a newby driver!). Boat clubs can be a good option, but if you are a weekend-only boater, reservations are hard to come by.
My .02 on partnering on a boat....
Only way for a private share to work well is if both parties are knowledgeable and experienced boaters, preferably good friends or family, and agreements over maintenance, repairs, and damage are worked out from the start. Experienced boaters understand that boating costs a lot of money, and they understand what kind repairs are chance occurrences and which ones are actually someones fault. I have partnered on boats with my friend (we are both professional boat mechanics) for years and we have never had a disagreement, it has worked out beautifully. Neither of us use the damn boats we've owned enough, so at least with two families with access they get used a reasonable amount.